SignedCapsulePkg/PlatformFlashAccessLib: Add NULL instance.

[mirror_edk2.git] / SignedCapsulePkg / Library / PlatformFlashAccessLibNull / PlatformFlashAccessLibNull.c

/** @file\r
  Platform flash device access library NULL instance.\r
\r
  Copyright (c) 2016, Intel Corporation. All rights reserved.<BR>\r
  This program and the accompanying materials\r
  are licensed and made available under the terms and conditions of the BSD License\r
  which accompanies this distribution.  The full text of the license may be found at\r
  http://opensource.org/licenses/bsd-license.php\r
\r
  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
\r
**/\r
\r
#include <PiDxe.h>\r
\r
#include <Library/BaseMemoryLib.h>\r
#include <Library/PlatformFlashAccessLib.h>\r
\r
UINT64 mInternalFdAddress;\r
\r
/**\r
  Perform flash write opreation.\r
\r
  @param[in] FirmwareType      The type of firmware.\r
  @param[in] FlashAddress      The address of flash device to be accessed.\r
  @param[in] FlashAddressType  The type of flash device address.\r
  @param[in] Buffer            The pointer to the data buffer.\r
  @param[in] Length            The length of data buffer in bytes.\r
\r
  @retval EFI_SUCCESS           The operation returns successfully.\r
  @retval EFI_WRITE_PROTECTED   The flash device is read only.\r
  @retval EFI_UNSUPPORTED       The flash device access is unsupported.\r
  @retval EFI_INVALID_PARAMETER The input parameter is not valid.\r
**/\r
EFI_STATUS\r
EFIAPI\r
PerformFlashWrite (\r
  IN PLATFORM_FIRMWARE_TYPE       FirmwareType,\r
  IN EFI_PHYSICAL_ADDRESS         FlashAddress,\r
  IN FLASH_ADDRESS_TYPE           FlashAddressType,\r
  IN VOID                         *Buffer,\r
  IN UINTN                        Length\r
  )\r
{\r
  if (FlashAddressType == FlashAddressTypeRelativeAddress) {\r
    FlashAddress = FlashAddress + mInternalFdAddress;\r
  }\r
  CopyMem((VOID *)(UINTN)(FlashAddress), Buffer, Length);\r
  return EFI_SUCCESS;\r
}\r